Chuck for tool bits



FIG. 1 is a top front perspective view of a chuck for tool bits, showing the new design;

FIG. 2 is a top plan view thereof; and,

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is another top front perspective view thereof at a viewing angle different from FIG. 1 ;

FIG. 6 is a partial enlarged view of FIG. 1 ; and,

FIG. 7 is a partial enlarged view of FIG. 5 .

The broken lines in the figures show portions of the chuck for tool bits that form no part of the claimed design. 

CLAIM The ornamental design for a chuck for tool bits, as shown and described. 